Class: HashDigger::Digger

Inherits:
Object
  • Object
show all
Defined in:
lib/hash_digger.rb

Class Method Summary collapse

Class Method Details

.dig(data:, path:, strict: true, default: nil) ⇒ Object 



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# File 'lib/hash_digger.rb', line 14

def dig(data:, path:, strict: true, default: nil)
  if data.respond_to?(:keys)
    data = data.deep_symbolize_keys
  end

  # form the path of non enumerable diggable groups
  path = path(path)

  until path.empty? do
    # *.* stands for "flatten the top level arrays until there's one * left
    # which means iterate the fetcher with the following path over the result of the flattening"
    while path.fetch(0) === '*' && path&.fetch(1, nil) === '*' do
      data = data.flatten(1)
      path.shift
    end

    # if the path ends with a "*" and that's it
    return (block_given? ? yield(data) : data) if path.length === 1 && path.fetch(0) === '*'

    subpath = path.shift

    if subpath === '*'
      subpath = path.shift
      data = data&.collect {|node| fetch(data: node, path: subpath, strict: strict, default: default) }
    else
      data = fetch(data: data, path: subpath, strict: strict, default: default)
    end
  end

  # return data or apply the custom block handler to the whole result
  return (block_given? ? yield(data) : data)
end